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Expected one result (or null) to be returned by selectOne(), but found: 2
時間 2021-01-16
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java
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Java
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原因: 1)查詢一條數據,但返回數據有多條 ps:數據庫中有相同的數據,不一定完全相同,可能是要查詢的字段相同 2)想要查詢多條數據,但是被前臺限制 今天搭建ssm框架實現登錄註冊時,遇見的一個小問題
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Expected one result (or null) to be returned by selectOne(), but found: 2
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MyBatis報錯:Expected one result (or null) to be returned by selectOne(), but found: 2
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